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11 Sheets-Sheet l J. A. V. TURCK CALCULATING MACHINE Original Filed July 7. 1922 March 21, 1933.

March 21, 1933. J. A. v. TURCK 1,902,598

CALCULATING MACHINE Original Filed July 7. 1922 11 sheets-sh et, 2

March 21, 1933. .1. A. v. TURCK CALCULATING MACHINE 1-1 Sheets-Sheet 3 Original Filed July 7, 1922 WIII/I/I/l/A March 21, 1933. J. A. v. TURCK CALCULATING MACHINE Original Filed July 7, 1922 ll Sheets-Sheet 4 March 1933. J. A. v. TURCK CALCULATIuG MACHINE 11 Sheets-Shet 5 Original Filed July 7, 1922 uHfl Lw'w AiiiiiifillfllilhIiiiiiiiiiiiiiiiiiiiiiiiilliiiiiiiiliiiliuiiifa nmmim [IZZY (91 J. A. V. TURCK March 21, 1933.

CALCULATING MACHINE Original Filed July 7, 1922 March 21, 1933. J v u c CALCULATING MACHINE Original Filed July '7, 1922 11 Sheets-Sheet 7 March 21, 1933. J, A. v. TURCK CALCULATING MACHINE Original Filed July 7, 1922 11 Sheets-Sheet 8v March 21. 1933. A, v, TURCK CALCULATING MACHINE Original Filed July 7. 1922 ll Sheets-Sheet 9 Q NWN March 21, 1933. J v TURCK 1,902,598

v CALCULATING MACHINE Original Filed July 7,. 1922 11 Sheets-Sheet 10 March 21, 1933. J. A. v u c 1,902,598

CALCULATING MACHINE Original Filed July 7, 1922 11 sheets-sheet 11 722 vs n for 6041*? a..1rawuk III Patented Mar. 21, 1933 UNITED STATES PATENT OFFICE JOSEPH A. TUBCK, 01 WHITE, ILLINOIS, ASSIGNOR TO FELT & TABRANT MIG. COIPLNY, OI CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS CALCULATING mcn mn Application fled July 7, 1988, Serial llo. 578,481. Renewed February 18, 1882.

- This invention relates to a multiple order keyboard calculating machine, which will perform automatically the process of multlplication and other calculations involving any suitable character of multiple strokes or actuationsof an adding mechanism and repetitions of the same number, taken either positively or negativel by a purely mechanical operation accor ing to the denominations of the multiplicand and multiplier, or

according to the other elements of the problem, without the necessity for progresslve and separate settings of the parts during the performance of the operatlon. The essential object of the invention is to provide a calculating machine such as above set forth having a motor drive mechanism for effecting the o ration of the machine to perform the ro lem, the power of the motor drive mec nism being connectable for the purpose ofactuating the machine, on setting of both factors of the Problem and being automatically disconnected from the mechanism of the machine on the solution of the problem. In accordance with a further feature of, the invention, the motor drive mechanism is combined with a hand drive for eifecting the multiple-stroke operation of the machine and provision is made whereby the machine may be optionally driven by hand or by the motor drive mechanism.

In addition to the general objects recited above, the invention has for further. objects,

such other improvements: in construction and advantages in operation as may be found to obtain in the mechanism hereinafter described or claimed.

In the accompanying drawings, forming a part of this specification and showing, for purposes of exemplification, a preferred form and manner in which the invention may be embodied and practiced, but without limiting the claimed invention to such illustrative instance or instances:

Figure 1 isa side elevational view of a calculating machine constructed in accordance with the improvements of the inven- 59 tion and showing the machine supported in a frame containing a motor and drive gearn P Fig. 2 is a longitudinal sectional elevational view of the calculating machine looking toward the left, on 11-11 of Fig. 13;

ig. 3 is another longitudinal sectional elevational view of the machine taken on its left hand side, on the line III-III of Fig. 15, and looking toward the right;

Fig. 4 is another longitudinal vertical sectional view of the machine, on the line IVFIV of Fig. 15, looking toward the ri t;

ig. 5 is an enlarged vertical sectional view taken at the right hand side of the machine, on the line V-V of Fig. 13, and looking toward the right (the multiple-con trol key-platebeing omitted) Fig. 6 is another enlarged longitudinal sectional view looking-toward the right and taken on the same lane but further to the front than that of ig..5 (omitting some of :the mgrphanism at the rear, which is shown in ig. 7 is another longitudinal sectional 7 elevational view of the machine taken at the extreme right hand side just within the case and looking toward the left, the side casing being removed;

Fig. 8 is another longitudinal sectional view of the machine taken at the right hand side and looking toward the left but in a plane, on the line VIIIVIII of Fig. 13, further to the left than that of Fig. 7.

Fig. 9 is a fragmentary longitudinal sectional view looking toward the right and taken in'a plane somewhat further to the right than that of Fig. 6;

Fig. 10 is a fragmentary sectional view taken transversely of the'machine in planes indicated by the line 10.10 of Fig. 9;

Fig. .11 is a detailed side elevational view of the motor and hand drive control device;

Fig. 12 is a detailed vertical sectional view of parts shown in Fig. 11;

Fig. 13 is a partial plan view of the calculating machine;

Fig. 14 is a partial plan view of a calculating machine with the top cover plate removed and showing the drive and con- 100 trol parts at the right hand side of the machine; and

Fig. 15 is a plan view of the machine to the left of the partial plan 'view shown in is incorporated in a calculating machine of the multiple order key driven type, such as the well known Duplex comptometer the general character of which is exemplified in the prior Letters Patent of the United States to Dorr E. Felt Nos. 762,520 and 762,521 dated June 14, 1904, No. 960,528, dated June 7, 1910, No. 996,009, dated June 20, 1911, and No. 1,003,723 dated September 19, 1911. Moreover, the invention is particularly adapted and in the resent instance especially designed for emp oyment in connection with the invention shown, described andclaimed in my prior Letters Patent of the United States No. 1,316,523, dated September 16, 1919, which invention involves broadly the automatic performance of the operation of multiplication in which both factors are multiplelace and completely predetermined and e ects the entire operation with mec anism of which the ordinal positions are permanent, said mechanism remaining and operatin in fixed ordinal places in the machine. asmuch as the details of construction of the comptometer may be readily understood from the prior Letters Patent hereinabove referred to and of themultiplying mechanism from my said prior Letters Patent, a condensed description of the general features of construction and operation of the comptometer mechanism and the multiplying mechanism-with its various controls and other parts, will be ample for an, understanding of this invention.

The various instrumentalities of the calculating machine are supported by the vertical longitudinal plates 1, constituting a part of the frame of a machine which is closed at the top by the-cover plate 9. The frame preferably comprises the vertical side or retaming plates, such as shown at 1, and similar intermediate or division plates, arranged respectively in the aces between the numeral wheels 2. All 0 these vertical plates are rigidly connected by suitable cross'bars or'tie rods 3 to form the main frame.

The adding 01" accumylating mechanism (see especially Figs. 2, 3 and 4) is pressed upward by a lever 5 and a sprin 6 carried by lower frame parts 7. Eac column or set of keys 4 forms a part of the accumulator-mechanism for transmitting to its numeral wheel an amount of travel pro-- portionate with the particular key operated and the accumulator mechanism for each column of keys and its corresponding nu-' meral wheel includes a'column actuator 8 pivotally mounted on a cross rod 51 on the frame 1 and yieldingly held'up by an accumulator actuating spring 10. Each key is provided with a stem extending down and caring upon a column actuator, and the key at the extreme front of the machine being farther from the ivotal axis of the column'actuator than tl ie key at the extreme rear of the machine moves the column actuator through a lesser arc than does the key last mentioned. It will be understood that the keys of each column are numbered from 1 to 9 in front to rear order of the machine and that the key at the extreme front is adapted to eflect actuation of the column actuator through an are approximately 1/9 of that produced by the operation of the key at the extreme rear of the machine and that, upon depression of intermediate keys, the column'actuator is moved through arcs proportionate with the value of the intermediate key actuated.

The column actuator 8 of each order or column of nine keys of'the machine is adapted to impart calculating movement to an accumulator and for this purpose is rovided at its forward end with a rack whic meshes with an accumulator pinion 1'8 journalled upon a transverse shaft 19 that extends across the machine. The pinion 18 of each order forms a part of an internal ratchet mechanism, not herein illustrated in detail, but disclosed in the prior patents hereinabove mentioned, and which becomes effective upon the upstroke of the column actuator to clutch the pinion 18 to a lantern wheel 21 and a transmitting pinion or gear 26 that rotates with the lantern wheel and and is adapted to mesh with an intermediate gear 24 on the transverse shaft 25. The gear 24 in turn meshes with the numeral wheel pinion 27 which drives the numeral wheel 2 of the accumulator mechanism. It will be understood that each time the column actuator is depressed the ratchet mechanism 20 moves idly and hence no motion is transmitted to the gear train ending with the numeral wheel 2; however, upon the return or upward movement of the column actuator, by the wellunderstood spring action the transmitting pinion 26 is clutched to t e accumulator pinion 18 a'nd the gear train rotates the numeral wheel 2 through the are determined by the particular key actuated.

Carrying mechanism is provided in each crrying impulses released from a accumulator mechanism for the purpose of actuating the accumulator of the next highest order of the machine each time a carry is to. go over from a lower order, for instance, when lO'is accumulated on the wheel of a lower order. For present purposes, it will not be necessary to give a detailed explanation of the carrying mechanism and a brief reference to parts of the carrying mechanism together with a general statement of their function, will suflice,'because ample description of the same will be found in the prior atents above mentioned. The carrying mec anism in each order is of the standard Duplex comptometer type having provision for permitting ordinal keys to be depressed simultaneously and column actuator impulses delivered in two or more adjacent orders, and yet for preventing any ower one of said orders from being actually delivered to the next higher of said orders until the column actuator movement of such higher order is completed. This operation of effecting simultaneous key driven actuation of a plurality of common actuators in adjacent orders, the strokes overlapping each other in any manner, is the action that has been referred to as Duplexing Attached to the accumulator gears-are carrying pinions 18 which respectively mesh with and drive carrying gears (see Patent No. 1,316,523) the latter functioning for the purpose of winding the carrying motor springs which connect the carrying gears yieldably with rotary escapements having two armed carrying cams. he said escape ments are given, by means of the said carrying motor springs, a half, revolution at each half revolution of the carrying gears or whole revolution of the carrying pinions for the purpose of actuating the carrying levers 32 each of which is pivoted on the cross pivot shaft or rod 33 and is arranged in line with the lantern wheel in the next higher order of accumulator mechanism, said carrying levers being raised by the carrying cams on each half revolution of the latter and having means operating on the pins of the said next hi her lantern wheel to move the latter and ot er parts of its accumulator mechanism one step at each carry. In order to prevent the carrying escapement member from effecting a carrying throw of the cooperating carrying lever at a time when the accumulator of the higher order is already in motion or is about td be moved by the column actuator that has been or is being depressed by one of the keys in that higher order, there is provided a carry detaining latch 35 in each order which operates to block the carr ing escapement member, whenever the co umn actuator of the higher orderhas been or is being depressed by one of the keys in that order and thus delays the carr from the lower to the higher order until t e column actuator regains its normal elevated position.

Such is, in brief outline, the manner in which prime actuations and carrying impulses are imparted to. the accumulator mechanism in the Duplex comptometer of the above mentioned patents. It will be understood that these actuating mechanisms are associated with various stop mechanisms set forth in the said patents, to limit the movements imparted to the accumulator mechanisms by the prime actuations and carrying impulses; all of these stop mechanisms are shifted into and out of their various stop positions to impose additional restriction on the movements of the carrying devices and to the prime actuations of the accumulators.

The cancelling or zeroing operation (see espeoz'aZZy F igs. 7 and 8) The cancelling means whereby the numeral wheels are reset at zero comprises a cancelling actuator, or zeroizing controlling means, consisting in this instance of a cross rock shaft 52, crank handle 53 and slotted cam device 54. These partt operate on a cancelling device comprising a segment lever 55 actuated by the slotted cam 54 (Fig. 7), a cancelling pinion 56 on the cancelling or intermediate shaft 25, and means by which said shaft may rotate the intermediate gears 24 when the shaft is in a certain position reltive to the gears. The cancelling means also comprises devices effecting a one-space adding movement of the column actuators, consisting of a transverse bar 57 (Fig. 3) adapted to depress the column actuators one space and give a one' space adding movemerit to the accumulator mechanism, which bar is reciprocated vertically (Figs. 3 and 7 by the roll mounted on slotted cam 54 (Fig. 7) through the medium of arms 58, which carry the bar at their ends and are pivoted at 59 to the frame 1 (as more fully shown and described in the aforesaid Felt and Turck Patent 1,072,934)

For accuracy in bringing the numeral wheels from their various positions to the 0 position, those of the second higher orders are first brought to the 8 position, and the units wheel is brought to the 9 position; then the cross bar 57 aud the column actuators having been depressed one step, rise and move all of the wheels one step. The wheels of higher order than units move to the 9 position and the units wheel immediately thereafter moves to the0 position, the said movement of the units wheel being detained in a known manner by a slightly elongated tooth 61 on its cancelling stop 37 (Fig. 3), with the result that the carrying mechanism operates, successively but practically instantaneously, across the machine from right to left to bring the said wheels of higher order to the 0 position and complete the cancelling operation. The above mentioned cancelling clearing or zeroizing mechanism is more particularl described in the prior Letters Patent 0 the United States of Dorr E. Felt and Joseph A. V. Turck, No..1,072,9 34.

With the said accumulating or adding mechanism or with other accumulating mechanisms suitable for the purpose, there is combined a multiple stroke mechanism as hereinafter described. The said accumulating mechanism maybe said to represent potentially one of the numbers or factors which. are to be multiplied together, though such factors may not ap ear at that time on the numeral wheels 0? the accumulator mechanism. The multiple stroke mechanism is set to control potentially the other factor or multiplier of the product to be obtained, and is connected with the said accumulator mechanism in such manner that, when operated, it will repeat each order of the accumulator mechanism, representing a denomination of the multiplicand, a number of times, according to the denominations of the multiplier, so as to accumulate the sum of the products of the multiplicand by each denomination of a multiplier; Thus the additive length or degree of stroke may represent the multiplicand and the number of strokes'represent the multiplier.

For example, suppose that 456 is to be multiplied by 123: the machine is adjusted for multiplication by connecting the actuat ing means of the accumulator mechanism, in the various orders thereon, with the corresponding orders of the multiplying mechanism. The multiplicand is set on the accumulating mechanism by depressing the 4, '5 and 6 keys. of thousands (5th order), thousands (4th order), and hundreds (3rd order) columns, according to the number of places in the multiplier, so that the product may be accommodated on the numeral wheels with the units of the product in the units order. In effect, such setting is part of the multiplication process and has multiplied 456 by 100, and the first actuation of the numeral wheels when their column actuators are released by the multiplying mechanism will show 45,600. The construction of the multiplying mechanism is such that the depression of the set keys in the orders named will set the corresponding orders of multiplying mechanism so that, when actuated, its fifth order will stop the corresponding accumulator numeral wheel at 4, its fourth order will stop its wheel at 5 and its third order will stop its wheel at 6; each cycle of the multiplying'mechanism while its connectionwith the accumulator mechanism are as above stated would add 4, 5 and 6 on the said This setting will be in the tens numeral wheels of the. 5th, 4th and 3rd orders, respectively, amounting to an accumulation 'of 45,600 at each cycle of movement. -"In the example given the multi lier being 1 only one such cycle is required Before the multiplying mechanism is thus actuated controls for its various orders are .set, so that three of its orders (representing 123 in the case supposed) may successively have first one cycle of movement, next two cycles of movement, and then three cycles of movement. The said controls also cause the connections between the respective orders of multiplying mechanism and accumulator mechanism to shift or trans-set successively and automatically to the right; so that, in the one l-cycle movement, the operative connection of the multiplying mechanism with the 5, 4 and 3 ordersof the adding mechanism will be released, and the 4th, 3rd and 2nd orders will become connected, each respectively with the same additive degree of movement which the 5th, 4th and 3rd orders formerly had, so that nowthe digits 456 will be actuated at each stroke in this new setting. This settingcontinues during the two cycle movement; after the two cycle movement has been completed the set connections will again be trans-set each one place to the right, the 4th, 3rd and 2nd orders becoming disconnected and the 3rd, 2nd and 1st becoming connected, and so remaining during the three 'cycle movement. This shifting of connection under the set controls is such that the highest connected multiplying lever will continue to add- 4 at each cycle of movement, in whichever column or order of accumulator mechanism it is acting ;-the next higher lever will continue to add 5 and the lower lever will continue to add 6. The additive degree of movement to add 4, which the highest multiplying lever originally has is thus preserved, but transset to the right from lever to lever until the requirements of the example have been fulfilled. The same is true of the other multiplying levers which have been set. During such successive accumulations or additions the accumulator mechanism-acts in a known manner, carrying from wheel to wheel or right to left. The result is a showing of 56088 on the numeral wheels. The process is a mechanical and automatic repetition of additions in the ordinary process of multiplication when worked from left to right, beginning with the ten thousands and ending with the units. Thus, the first I-cycle movement accumulates 45600; the second 2- cycle movement accumulates 9120; and the final '3-cycle movement accumulates 1368 more, the total being the correct product and shown on the numeral wheels.

In the above operation, the principal functions to be performed automatically are to incnt.

control the multiplying levers so that they will make actually the required number of strokes in all the denominations of each setting, to trans-set the additive degree of movement of each lever to the next lower lever at the end of each cycle of movement, and to prevent anyaccumulation of the numeral wheels of the adding mechanism during the period of trans-setting. However, 111 order to preserve the continuity of the setting of the multiplier there must be operations of the control mechanism, for any intermediate ciphers which it contains must be trans-set and the multiplicand must be trans-set past such cipher. For this purpose, the multiplying lever makes a stroke, but such stroke representing a cipher must not actuate the addin mechanism. This is preferably accomplis ed by giving eleven steps or positions to the multiple control mechanism, represented on its indicators by 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 and a blank. If an indicator 219 be set at 9, any set multiplying lever will give nine strokes, and this capacity may thenbe' trans-set to the next lower, lever. So of all the other digits, according to their value. The trans-setting of all the levers occur simultaneously after the stroke from 1 to 0 and after saiolstroke the adding mechanism is disconnected, by the cipher control mechanism. For example, in multiplying 456 by 1002, the 456 is caused to appear once on the adding numeral wheels in such position as to represent 456000. The three multiplying levers set to give 456 are now trans-set three places to the right, without actuating the adding mechanism. And then they will cause its actuation twice for a total value of 912. The multiple control indicators, with which the mechanism functionally corresponds, successively show during the strokes of this operation (the blank spaces of the indicators being represented by dashes, and it being understood that all indicators which are not set show blank spaces) The product 456912 appears on the adding numeral wheels at the end of the strokes to 0, and during the last stroke to the whole machine resets itself in normal position.

In the adding mechanism, all ciphers are in the usual manner, represented by unset lteys. The corresponding multiplying levers remain set at normal, or what may called neutral and have no additive move- But this neutral setting is trans-set as are all digits, so as to preserve the continuity of the multiplicand. The important feature is the automatic taking care of intermediate ciphers in the multiplier, so that the continuity of both factors is preserved, and that of the multiplicand in any transsetting, and the operation of the machine as a whole is continuous without inaccurate accumulation.

The multiple stroke mechanism (see especially Figs. 5, 2, 4 and 3) Arranged substantially in line with each order of adding mechanism is a multiplying lever having the i'unction, when connected with its corresponding column actuator 8 and oscillated in vertical lon itudinal planes by a main rock shaft 100 o depressing the column actuator for a greater or less distance, according to the setting of the lever and thereby causing an accumulation on the adding mechanism as the column actuator rises to normal position. Each multiplying lever consists of two independent but connectable parts ivoted on a cross rod 101 of the frame. Sue of these parts, which for convenience is termed the rack lever, has a rearward arm 102 formed with an inner toothed rack 103 by which it may be locked in any oi ten different positions to its companion lever part, with an outer toothed rack 10% by which it may be temporarily locked to a lever part in the next higher order, with a tooth 105 by which a cross stop bar 106 of the frame arrests it in normal position and with a ratchet 107 by which it may be held when set by an adding machine key at any one of nine distances from the bar 106 so as to be capable of accumulating in its order any inultiplicand digit from 1 to 9 in a stroke, the number of strokes representing the multiplier. The said racks and ratchets are formed on arcs concentric with the lever pivot, and their teeth are related to the nine keys of the order of the adding machine. The lowest ratchet tooth is related to the one key and ninth tooth of the 0 key, and the lowest rack notches are related to the l and the ninth (inner and outer) rack notch is related to the 0 key. 'lhe other lever part, which is termed the dog lever, is composed of two rearwardly extending arms 108 between which a locking dog 100 (Fig. 5) is slidahle radially (shown and described in my aforesaid Patent l,316, 523, in its Figs 22 to 30 and at its page 9, lines 12-438 et seep}. Mounted on the dog lover is a roller U0, and the roller of each dog lover is operable from below by a cum "ill lined on the main rock shaft 100. Springs 11.12 and pull the lever parts rearwardly and downwardly, thereby tending to seat the tooth l05 against the bar 100, to-elevate the forward lever arm 11% and to hold the rollers 1.10 against their res ctive cams. Each arm 114 is provided wit a lateral lug 115 by means of which the multiplying lever is adapted to be connected with its companion column actuator. For each rachet 107, there is provided a pawl 116 pivoted to the frame at 117, formed with a tail 119, and pressed toward the ratchet by a. spring 118. A transverse rock bar 120 provlded with projections 121 is adapted to depress the tails 119 of'the pawls 116 and to release all of the awls from their respective ratchets, after the desired rack levers have been set for operation.

The normal position of the cams 111 is at the to or extreme of their throw,-supporting 5m rollers 110 and dog levers in their most elevated position. Assuming that the rack levers have been connected withtheir column actuators, as later explained, and that 456 is to be multiplied: the 4, 5 and 6 keys of the adding machine are depressed, in successive orders, to the left of the units column according to the number of places in the multiplier. This, through column actuator 8 and link 139, elevates the rear arms of the corresponding rack levers 102, which were resting with their teeth 105 on the cross sto bar 106 and were held down by their springs 113, with the result that said levers are held up by the pawls 116, which engage respectively the fourth, fifth and sixth notches of the ratchets 107 of the respective levers. While in these positions, the said rack levers are connected each to its companion do lever by the dogs 109. Each dog 109 slides in slots 122 in the dog lever, being held in place by a sliding retaining frame (see Figs. 52 to 54 inclusive of Patent No. 1,316,523) and is pressed outwardly by a s ring. Each dog has a left hand outwardly irected tooth 125 by which it may engage the inner rack 103 of its companion rack lever (Fig. 5) and a right hand inwardly directed tooth 126 (Fig. 2) by which it may engage the outer rack of the rack lever in the next order to the right. As explained in Patent No. 1,316,523, page 9, a pawl 128 is pivoted on the dog-lever and is provided with an outwardly extending tail 130. A transverse rock bar 131 pivoted in the main frame has fixed thereto a series of L-shaped arms 132 (Figs. 2 and 5) which are adapted to depress the awl tails 130 when said bar 131 is rocked orwardly, thereby disengaging all of the awls 128. from the aforesaid dog-carrying rame. The normal position of the parts is neutral (Fig. 2) with the pawls 128 in en agement with the dog-carrying frame an the oppositely projecting dog teeth 125 and 126 out of engagement with the rack of either the lever to the right or to the left of the dog. This position permits the setting of the rack levers, as above described. As soon as the rack levers have been so set, the initial movement of the power shaft 100 causes the bar 131 to be rocked forwardly (see Figs. 27, 28 and 29 of my Patent 1,316,523), thereby releasing the pawls 128 (see also Figs. 25, 26, 30, 22 and 23 of my said Patent 1,316,523 and its page 9,

lines 55-71 et seq.), and permitting the spring actuating dogs to engage the inner racks 103 of their companion rack levers. Immediately thereafter, the bar 120 is rocked rearwardly so as to release the pawls 116 from the ratchets 107 of the rack levers. This leaves the multiplying levers free for vertical vibration, the companion rack lever and dog lever of each lever assembly being locked to ether and working as one lever. In operation, each multiplying lever assembly is alternately pulled down the springs 112 and 113 and elevated by t e cams 111. The arms 114 which drive the adding mechanism risingas the rear ends of the levers are let down by the cams. As the said multiplying levers are so vibrated the tooth 105 of each one descends to the stop bar 106 and rises therefrom, each lever havlng a particular additive degree of stroke for which it has been set. Thus, while the cams 111 all have the same throw and allow the multiplyingl levers to start downwardly from the same eight, each lever has its own additive throw determined by the set distance of the tooth 105 of the rack lever from the stop bar 106. The stopping position of the multiplying lever at the top limit of the cam throw represents the stopping of the column actuator at its'low point, according to the key which was depressed to set it.

K ey set and automatic control connecting device (see especialby Figs. 93, 3, 4 and 5) This device connects and disconnects the adding mechanism and the multiplying mechanism, andis operated to convert the key driven machine to a key set machine, and vice versa. In the particular construction illustrated, it connects the column actuators 8 with the lateral lugs 115 of the multiplying levers. Each column actuator 8 is provided with a link 139 pivoted thereto at 140, pressed rearwardly by a spring 141 and formed with a jaw 142 on its rear side. In the normal position of the rack levers 102, with their rear stop arms 105 depressed against the stop bar 106 and their forward arms 114 elevated (Fig. 2), the lugs 115 will be exactly opposite to the jaws 142, and it is at this time that the jaws are swung rearwardly to engage the lugs. Each link 139 has fixed thereon a lateral pin 143, the rear side of which is engaged by one of a series of arms 144fixed on a transverse rock bar or shaft 145, which is ulled to turn for wardly by a spring (see ig. 40 of Patent N0. 1,316,523). When this shaft is rocked forwardly the arms 144 swing backwardly, releasing the pins and permitting the springs 141 to force the jaws of the links 139 into engagement with the lever arm lugs 115, whereby each upward and downward movement of the multiplying levers 102, 108

causes a movement for the same distance of the column actuators 8 and a corresponding accumulation on the adding machine. How ever, a multiplying lever will have no vertical movement unless a key of the adding 10 machine, and in the order to which the lever belongs, has been depressed subsequent to the connection of the lever and column actuator. This is more fully described in my aforesaid Patent 1,316,523 at its page 8, line 105 to page 9, line 25 et seq. and its page 10, lines 19-40, and shown in its Figs. 22 to 30. Pivoted at 147 on the main frame and formed with cam slots 148 and 149 is an angle lever 146. The cam slot 148 engages a roller 150, provided on a forward arm 151 of a lever which is pivoted on the journal of the rock shaft 145 (shown and described in my aforesaid Patent 1,316,523 in its Figs.

15 and 6 and its page 11, lines 28-36), the said lever having a rear arm 152 terminating in'a lip 153, which enga es the top of the rear part of the rectangu or portion of the rock shaft. The rearward arm of the angle lever is connected by a link 154 with a setting segment 155 ivoted on a cross rod 156 of the frame. (F my aforesaid-Patent 1,316,523 in its Fig. 15.) Said segment is provided with a pro ection 134 extending through a slot in the casing and affording a handle b which the Segment may be set at will ig. 15). On the exterior ofthe casing by the slot may be marked a rear, a front, and an intermediate position for the setting segment. These 0 marks. may conveniently be respectively Add M111 and Div. When the handle is at Add, the rear part of the slot 148 has thrownthe arm 151 upwardly and the lip 1 153 has rocked the shaft 145 rearwardly, with the result that the arms 144 move forwardly against'the pins 143, thereby hold ing the links 139 away from the lugs 115. In such position, the adding mechanism is disconnected from the multiplying levers and becomes freely key-driven, to be employed at will for rapid addition and subtraction (subtraction being of course performed by complemental addition, em oying the c'odigital markings on the a ding keys, as in the well known Duplex comptometer machines of, for instance, the aforesaid Felt Patent 762,520). When the handie is at Mill, the middle part of the slot 148 has caused the arms 144 to swing rear- 9 wardly and to permit the jaws 142 to grasp the lugs-115, in which position the machine becomes key set. Any setting of the adding keys is maintaiped by the pawls 116 and thereafter by the dogs 109, as already explaincd. This is shown and described in ig. 3, and see also.

my aforesaid Patent 1,316,523 in its page 11, lines 50-67 and page 9, lines 12-68 et seq. and page 10, lines 19-40 and in its Figs. 22 to 30 and its Figs. 15 and 6.

It is preferable that the column actuator return upwardly b the power of its own spring 10, and in ependently of the multiplying lever. For. this urpose, all of the links 139 are disengaged From the multipl ing lever arms 114 at the bottom of t e stroke. This mechanism is described in detail on page 11 of Patent No. 1,316,523 and need not be set forth in detail in the present application. The said disenga in mechanism is operated to permit the in s 139 to re-engage with the multi 1 ing levers to permit further actuation o t e segment levers by the multiplying mechanism. The said links 139 are also disengaged from the multiplying levers to prevent accumulation for a cipher in the multiplier as will be hereinafter explained.

The actuating era/nit mechanism (see especially Figs. 3, 5, 6', '7, 8, .9 and 14) The multiplying mechanism is locked against operation until the handle 134 has been set at multiplication or division; until the key has been depressed on the adding key board; until a control device for the multiplying mechanism has been set; and until a release key 171 has been depressed. The cancelling or zeroizing handle 53 must be in its normal forward position but the details of these locking means are left for later explanation.

The crank or power shaft of the multiplying mechanism, which in accordance with the present invention ma be either power driven or driven by han is shown at 172 and extends transversely across near the front of the machine, being mounted in suitable bearings in the frame. From this shaft which is, in the manner illustrated, rotated toward the rear of the machine, or in a counter clockwise direction as viewed in Fig. 3, an oscillatory movement is transmitted to the main 0 crating shaft 100. The rock shaft 100 supp ice the power for most of the operations of the multiplying mechanism. Acrank wheel 165 (Fig. 3) is mounted on the left end of the power shaft- 172 and a wrist pin on said wheel is connected with a pitman 174, pivoted at 175 on a swingin arm 176. A toothed rack 177 meshing with the top of a toothed segment 178 on the rock shaft 100 is also pivoted at 179 to the said swinging arm. The rack 177 is guided by a frame 180 provided with rollers 181 which hold the rack in engagement with the segment. The said swinging arm 176 (Fig. 3 and also my aforesaid Patent 1,316,523 in its Figs. 18 and 19) is pivoted on the main frame at 183 and has attached thereto a parallel plate 184, providing the arm with a bifurcated upper end. In this bifurcation formed by arm 176 and plate 184. the pitman 174 is pivoted. The pivot 179 of rack 177 is vertically adjustable on the swinging arm by having its pivot mounted in slots 185 where it is clamped by a nut 186. By this means, the angle of rocking of the shaft 100 may be accurately determined.

When the power shaft has started to turn rearwardly at the beginning of an example, its first effect is to turn the main cam shaft 100 forwardly for a short are from the position shown in Fig. 5. This causes certain movements before the rearward rock of the cam shaft begins and the rear ends of the multiplying levers begin to descend. First the rock shaft 131 is turned forwardly to release the dogs 109 and allow them to spring upwardly. This is accomplished (as more fully shown and described in my aforesaid Patent 1,316,523 at its page 12, line 106 to page 13, line.33 and in its Figs. 27,

28, 25, 26. 29a; and 22) by a toggle 208 through which the shaft is rocked and by the breaking of which the shaft is returned to normal position. A pin 192 (Fig. 3) projects from an arm 193 (Fig. 3 and also more full shown in my aforesaid Patent 1,316,523 in its Figs. 18, 19 and 6) fixed on the main cam shaft 100 at the left of the machine. On the forward rocking of the shaft 100 said pin engages thehook 194 of a link 195 and pulls the link forwardly. The said link 195 is pivoted at 196 to the lower arm 197 of an angle lever having an upper arm 198 and mounted on the fi ame by a pivot199. The link 195 is also connected with said arm 197 by a spring 200 tending to pull the link upwardly, such action being limited by a stop 201 (Fig. 3 and also in my aforesaid Patent 1,316,523 in its Figs. 27 and 28 and at its page 12, line 128 to page 13, line 17) on the link which engages the front of the arm 197. The rearward movement of the arm 197 is limited by a stop pin 202 on the frame (Fig. 3) and after the arm 197 has been pulled forwardly by the action of the link 1955- from the position shown in Fig. 3 said arm 197 bears againsta pin 203 on an arm 20 1 of the rock shaft 120, (Fig. 4 and also in my said Patent 1,316,523 in its Figs. to and 22 and at its page 9, line 31 et seq.) the said arm 20% being )ulled rearwardly by a spring 205 (Fig. 4). The fbrward movement of the link 195 rocks the upper arm 198 rearwardly causing it to press on a short lateral lug of an arm 207 (Fig. 3 and also in my said Patent 1.316.523 in its Figs. 27 and 28 and its page 13, line 12 ct seq.) mounted on the, said pivot 199, thereby rocking the arm 207 rearwardly. The arm 207 is connected by a toggle 208 with an arm 209 fixed on the rock shaft 131. whereby the latter is rocked forwardly to trip the dog pawls 128 (Fig. 5).

On breaking of "the toggle in the manner fully set forth on page 13 of Patent No. 1,316,523 the rock shaft 131 is allowed to rock backwardly thereby releasing the dog pawls 128. This tripping and releasing of pawls 128 is more fully shown in Figs. 25, 26, 30 and 22 of my said Patent 1,316,523. Pivotally mounted on the rock shaft and controlled by a spring is a two-armed latch 215. As the arm 198 moves rearwardly, the latch 215 drops over the upper end of the arm 198 and holds it in rearward position, while thepin 192 rocks rearwardly. The forward swinging of the arm 197 under the pull of the link 195 has changed the angle between it and the link 195 and separated the stop 201 from the arm 197; as the pin 192 moves backv from over the hook 194, the spring 200 pulls the link up out of the path of the pin. shaft 218 which bears against the rear arm of the latch 215, and when this shaft rocks forwardly it throws up the latch allowing the parts to return to normal position (excepting that the arm 197 will be against the pin 202).

Second, the rock shaft 120 (Fig. 5) is turned rearwardly to release the set pawls 116. This is accomplished (Fig. 3) by the lever arm 197 shifted by hook-link 195 engaged by pin 192 on'plate 193 attached to shaft 100. Immediately after the two pairs of the multiplying levers have been locked together b the dogs the lower arm 197 of the angle lever turns forwardly and actuates the pin 203 on the arm 204 of the shaft 120. This overcomes the tension of the shaft returning spring 205 and rocks the shaft rearwardly enough to engage the tails of the pawls 116 and release the pawls (Fig. 5).

Multiple control mechanism (see especially Figs. 2, 3, 4 and 5) This mechanism automatically determines the. number of additive strokes which shall\ no he made for each digit of the multiplier, which may be from 1 to 9. It comprises several orders (according to the capacit of the machine) of oscillating parts inclu ing numeral w ieel indicators 219 (Fig. 2) working by eleven stepped positions. The first nine steps between these positions, that is to say, from 9 to 0, are additive; the next step from zero to blank or normal is adjustlve in preparation for the automatic operation of the next lower order of control mechanism. Each indicator wheel has its periphery divided into elevens aces showmg in order, as it rotates step y step forwardly, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 and a blank trol mechanism.

multiplier be 123 that indicator wheel 219 which is in line with the units order of the multiplicand is set to one (to re resent the hundreds order of the multiplier the next lower wheel is set to 2 and the next lower wheel is set to 3. Then, after being so set, the orders of control mechanism one after theother beginning with the highest, are caused by the power mechanism to return step by step to their normal positions, and an additive stroke of the multiplier levers being made for each step of such return, with the exception of the-step from zeroto blank. Such setting and return of the control mechanisms are regulated primarilyby eleven-tooth ratchets and suitable pawls. The indicator wheels 219 (Fig. 2) are mounted to turn on a cross rod 220 held in the frame, and they are covered by a removable plate 221 provided with an aperture 222 for each wheel said aperture being so arranged that w en the wheel is in normal position the blank space shows through the aperture and when the wheel is turned back to multiply for any digitsuch a digit will show through the aperture.

Each order of the control mechanism (with exceptions as to the highest and lowest orders hereinafter noted) is further'provided with the following parts: a series of setting keys 223 marked from 9 to 0, each having in setting function a multiplier digit value corresponding with its marking, each key being mounted to slide radially inwardly and outwardly in the plate 221 and spring pressed outwardly. When the key is depressed, it releases the control mechanism of its order and acts as a stop (page 14 of l atent No. 1,316,523) to arrest the same in position to cause thereafter as many multiplying strokes as there are units in themarkiug of the key. Inasmuch as the multiple control mechanism is not shown in detail in the drawings of the present application reference is made to pages 14 and 15, and more particularly Figs. v31to 39 inclusive of Patent No. 1,316,523 for a detailed description of the parts of the multiple control-mechanism. The details of these parts, however, form no part of the present 'inven-' tion and, for the sake of simplicity, it will be thought suiiicient to give a general outline of the operation of the multiple con- Assuming that the setting keys are set to indicate the multiplier 123 and the adding keys have been previously set to indicate the Inultiplicand 456, the machine would now be readyior operation if it were not for the locking of certain parts to guard against mismanipulation, the various locks beingcontrolled by the locking key 171. The description of said locks can best be understood later, and the description of the operation of the multiple control mechanism is continued under the assumption that the locking key 171 has been depressed torelease the locks. As the power shaft of themachine is actuated, the main cam shaft is caused to rock first forward and then backward and forward as above described.

When, in the above operation, the control arrives at a number of additions of the multiplicand corresponding with the digit of the multiplier have been made and no more such additions are to be made of the multiplicand in its present setting on the adding mechanism, but the multiplicand is to be trans-set one place to the right before its repetition by the next lower stroke control begins. Such shifting or trans-setting is performed by the trans-setting mechanism herein described. But it is first necessary that the mechanism of the higher control refrain from causing any addition during the remaining step from zero to normal. This is insured by the cipher control mechanism, the operation of which is more or less coincident with the operation of the transsetting mechanism.

The multiple stroke controls are not actuated one by another in the preferred form of the machine. A higher control will bring parts to such position that the operation of a lower control may be caused to begin, but the actual operation of the control is from the power mechanism, separately by each control. The number of multiple controls may therefore be readily increased to enlarge the capacity of the machine.

Cipher control mchanim (see especially Figs. 2, 4 and 6) For a complete description of the cipher control mechanism, reference is made to pages 16 and 17 and especially Figs. 40 and 41 of Patent N 0. 1,316,523. The cipher control mechanism prevents accumulation for any factor-cipher and is controlled by the corresponding factor-setting device. The ciphercontrol mechanism operates whenever the active (highest) control reaches the zero position, because the next higher control is then at the normal position either because it was not set or because it has finished its cycle. This operation also occurs when the next lower control becomes active.

at the zero position, having'been originally so set. If the original setting of the multi plier were 3000003 and the multiplicand 999, the highest control would cause 999 to be repeated three times at the left, then the 999 would be repeatedly trans-set to the right six times without an additive stroke, and then 999 would be repeated three times at the right, giving the product of 2,997,002,997. It will be noted from the foregoing that 

